email_handler.py

##------------------------------------------
##--- Author: Pradeep Singh
##--- Blog: https://iotbytes.wordpress.com/programmatically-send-e-mail-from-raspberry-pi-using-python-and-gmail/
##--- Date: 21st Feb 2017
##--- Version: 1.0
##--- Python Ver: 2.7
##--- Description: This python code will send Plain Text and HTML based emails using Gmail SMTP server
##--- Modified 31 October 2019 by Chip Fleming for Irrigation System Master Water Valve project
##------------------------------------------


import configparser, inspect, os
import smtplib
from email.mime.text import MIMEText

#Form the absolute path for the settings.ini file
settings_Dir = os.path.dirname(os.path.abspath(inspect.getfile(inspect.currentframe()))) 
settings_File_Path =  os.path.join(settings_Dir, 'settings.ini')



#================= GET SETTINGS FROM EMAIL SECTION IN settings.ini FILE ==============
def read_Email_Settings():

    try:
        config = configparser.ConfigParser()
        config.optionxform=str   #By default config returns keys from Settings file in lower case. This line preserves the case for keys
        config.read(settings_File_Path)
        
        global SMTP_SERVER
        global SMTP_PORT
        global FROM_ADD
        global recipients
        global TO_ADD
        global CC_ADD
        global USERNAME
        global PASSWORD
        
        SMTP_SERVER = config.get("EMAIL","SMTP_ADD")
        SMTP_PORT = config.get("EMAIL","SMTP_PORT")
        FROM_ADD = config.get("EMAIL","FROM_ADD")
        TO_ADD = config.get("EMAIL","TO_ADD")
        USERNAME = config.get("EMAIL","USERNAME")
        PASSWORD = config.get("EMAIL","PASSWORD")

    except Exception as error_msg:
        print ("Error while trying to read SMTP/EMAIL Settings.")
        print ("Error", str(error_msg))
#=====================================================================================
read_Email_Settings()

class Class_eMail():
    
    def __init__(self):
        self.session = smtplib.SMTP_SSL(SMTP_SERVER, SMTP_PORT)
        self.session.ehlo()
        self.session.login(USERNAME, PASSWORD)

        
    def initialise_Mail_Body(self, Subject):
        #Prepare Mail Body
        Mail_Body = MIMEText()
        Mail_Body['From'] = FROM_ADD
        Mail_Body['To'] = TO_ADD
        Mail_Body['Subject'] = Subject
        return Mail_Body
    
    
    #Call this to send plain text emails.
    def send_Text_Mail(self, Subject, txtMessage):
        Mail_Body = MIMEText(txtMessage)
        #Send Mail
        self.session.sendmail(FROM_ADD, TO_ADD, Mail_Body.as_string())
        

    def __del__(self):
        self.session.close()
        del self.session